On Thu, May 07, 2015 at 07:22:28AM +0000, volker.obhof.w at sew-eurodrive.de wrote: > I sniffed data with wireshark from wpa_supplicant. I recongnized that wpa_supplicant sends almost every second a NULL function frame to my AP. wpa_supplicant does not send that; the WLAN driver or firmware may do that to update its power save state. -- Jouni Malinen PGP id EFC895FA